National Academy of Sports Medicine (NASM) Certified Personal Trainer (CPT) Practice Exam

Electrolytes are minerals found in the human body that carry an electrical charge. This characteristic is essential because electrolytes, such as sodium, potassium, calcium, and magnesium, help maintain a variety of critical bodily functions. They play a pivotal role in regulating nerve function and muscle contraction, balancing fluids in the body, and maintaining acid-base balance, which is vital for the overall health and functioning of cells.

When electrolytes dissolve in body fluids, they separate into positively or negatively charged ions, which enables the conduction of electrical signals throughout the nervous system and is crucial for muscle contractions, including the heart. Proper electrolyte balance is necessary for hydration, maintaining blood pressure, and supporting other metabolic processes in the body.

Understanding this aspect underscores the importance of hydration and proper nutrition to replenish these minerals, especially during intense exercise or in situations causing excessive fluid loss.